How do I update the element at a certain position in an ArrayList? [duplicate]

Answer 1

 import java.util.ArrayList;
 import java.util.Iterator;


 public class javaClass {

public static void main(String args[]) {


    ArrayList alstr = new ArrayList<>();
    alstr.add("irfan");
    alstr.add("yogesh");
    alstr.add("kapil");
    alstr.add("rajoria");

    for(String str : alstr) {
        System.out.println(str);
    }
    // update value here
    alstr.set(3, "Ramveer");
    System.out.println("with Iterator");
    Iterator  itr = alstr.iterator();

    while (itr.hasNext()) {
        Object obj = itr.next();
        System.out.println(obj);

    }
}}